“International migration, the rapid uptake of mobile phones in developing countries, and steady reductions in international call prices – especially in the form of flat-rate (and even free) calling plans – have contributed to traffic increases. Nevertheless, recent growth rates are well below the 13% average that carriers could count on to offset declines over much of the past 20 years,” according to a TeleGeography blog post entitled, “The bell tolls for telcos?”.

The odd thing is that when TeleGeography added Skype’s traffic to international phone call volumes, international traffic would have increased right at the usual 13% growth rate. The market research firm estimates that cross-border Skype-to-Skype voice and video traffic surged 44% higher in 2012, totaling 167 billion minutes.

“This suggests that although demand for cross-border communications has not declined, an ever growing number of callers have chosen to take telcos out of the equation,” TeleGeography points out.

There’s no let-up in sight for telcos as pressure from alternative voice and video IP services grows. A host of players, including “Google (Talk and Voice), WeChat (Weixin), Viber, Nimbuzz, Line, and Kakao Talk, have gained popularity,” TeleGeography notes. “Perhaps most ominously for telcos, Facebook recently added a free voice calling feature to its Messenger application.”